Process of producing lime or cement and combustible gases.



No. 685,064. Patented Oct. 22, 190i.

* A. L. SCHUBERT.

PROCESS 0E PRODUCING LIME 0B CEMENT AND CCMCUSTIBLE GASES.

(Application filed Apr. 2, 1901.) (No Model.) 2 Shef's-Sheel I.

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No. 685,064. v Patented Oct. 22, I90I.

A. L. SCHUBERT. PROCESS OF PRODUCING LIME 0R CEMENT AND COMBUSTIBLEGASES.

(Application filed Apr. 2, 1901.)

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(No Model.)

A Wihyzsses UNITED STATES PATENT "OFFICE.

ALVIN LINCOLN SOHUBERT, OF SACRAMENTO, CALIFORNIA.

PROCESS OF PRODUCING LIME 0R CEMENT AND COMBUSTIBLE GASES.

SPECIFICATION forming partof Letters Patent No. 685,064, dated October22, 1901.

Application filed April 2, 1901. Serial No. 54,045. (No specimens.)

To aZZ whom it may concert L:

Be it known that I, ALVIN LINCOLN SCHU- BERT, a citizen of the UnitedStates, residing at Sacramento, in the county of Sacramento and State ofCalifornia, have invented a new and useful Process of Producing Lime orCement and Combustible Gases Suitable for Heating, Lighting, and PowerPurposes, of which the following is a specification.

My invention is an improved process of producing lime or cement andcombustible gases suitable for heating, lighting, and power purposes.

The object of my invention is to effect an economy in the materials usedand to obtain a larger percentage of combustible gases than heretoforeby converting the products of combustion, as well as all crude gaseousmatter coming from raw materials, largely into combustible gases.

In the accompanying drawings, Figurel is a vertical sectional View of apair of generators adapted for carrying out my improved process. Fig. 2is a horizontal sectional view of the same, taken on a planeindicated bythe line a a of Fig. 1. Fig. 3 is a similar view iligtken on a planeindicated by the line b b of The form of apparatus here shown forcarrying out my improved process consists, essentially, of a pair ofgenerators A A, each of which has a lower combustion-chamber B and achamber 0 above the same adapted to contain a charge of limestone or rawcement. The arch D over the combustion-chamber, and which forms thebottom of the chamber 0, is provided with apertures or channelsE,whereby said chambers communicate with each other. In eachcombustion-chamber B is a grate F of suitable form, below which is avessel G, containing water. Each combustionchamber B has a suitabledoor, through which it may be charged with fuel, and each chamber 0 hason its upper side a suitable stack-valve H, through which it may becharged, and'o'n one side a door I, through which the charge may bewithdrawn. An air-blast pipe K discharges into each combustion-chamberat a point below the grate and is provided with a suitable valve L. Agas-pipe M is provided with branches N, which lead from and connect thecombustion chambers at a point slightly above the grates thereof, andeach of said branch pipes is provided with a valve 0. A suitable valvedpipe P is adapted for discharging oil or steam at will into either ofthe combustion-chambers at'a point above the fuel therein. A blast-pipeR is provided with branches S for discharging an air-blast upward in theupper portion of each ofthe combustion-chambersat will. Each branch pipeS has a valve S. A pipe T connects the upper portions of the chambers Oand is provided with a valve U.

In carrying out my improved process I first fill each of thecombustion-chambers B with any kind of solid carbonaceous fuel to thedepth of about seven feet, and having ignited the fuel cause the same toburn by discharging blasts of air therethrough from the pipes K, thestack-valves H having been opened to allow the products of combustion toescape. This heats the chambers O intensely and is continued until thefuel is in a state of incandescence. The blasts of air are then cut offby the valves L. Each of the chambers O is then charged through the openstack-valves H with limestone or any other form of calcium carbonatewhen I desire to make lime or when I desire to make cement with rawcement mixed with carbonaceous fuel. The stack-valves H are then closedand the valve -L of one of the gen'eratorssay of the generator A-isopened, thereby applyinga blast of air to the body of incandescent fuelin the chamber 13 of said generator A, causing the said fuel to burn andthe products of combustion to pass upward therefrom directly through thebody of limestone or raw cement and coal in the chamber 0 above,

the said products of combustion percolating through limestone or cementand coal and heating the same and driving out the carbonic-acid gascontained in limestone. If the material in the chamber 0 be limestone,the same is reduced to lime. If the material in the chamber 0 be rawcement and coal, the heated products of combustion from the body ofburning incandescent fuel below drive out of the raw cementcarbonic-acid gas and vapor of water contained therein, and from thecoal mixed therewith coal-gas, tar, ammonia, and vapor of water. Theproducts of com bustion from the lower body of burning incandescentsolid fuel, together with the gaseous matters and vapor of water fromthe limestone or raw cement and carbonaceous fuel, are caused to passfrom the chamber 0 of generator A to the chamber 0 of the generator Aand down through the body of limestone or raw cement and coal containedin said chamber 0 of generator A, thereby causing the gaseous mattersand vapor of water in the charge therein to be expelled and mingled withthe products of combustion and gaseous matter from the generator A. Allgaseous matter and products of combustion are then passed down throughthe body of highly-heated solid fuel in chamber B of generator A and areconverted into a fixed combustible gas thereby, excepting the nitrogencontained in the air used for combustion. The fixed gases are dischargedfrom the chamber B of generator A through the valved branch pipe Nthereof and the pipe M to the point where they are consumed, or topurifiers if the gases are to be used for illuminating and powerpurposes. lVhen the temperature of the heated fuel in the chamberB ofgenerator A becomes too low to fix the gases, the operation of the saidgenerators is reversed. Hence while the body of fuel in onecombustion-chamber is in a state of combustion and is being subjected tothe action of the air-blast the previously-heated body of fuel in theother combustion-chamber is utilized for fixing the gases resulting fromthe products of combustion and the gases and vapors expelled from thelimestone or raw cement and coal in the chamber 0.

If the material treated in the chambers G be limestone, the same afterit has been reduced or converted into lime is removed therefrom throughthe door I. If the material in the chambers C be raw cement and coal,the cement after it has yielded its gases and vapors and after the coaladmixed therewith has after yielding its gases and vapors been convertedinto coke must be clinker-ed. To effect this, air-blasts are admittedthrough the pipe R and branch pipes S, thereby causing combustion of thecoke mixed with the partially-burned cement, and hence clinkering thecement. The stack-valves H may be left open or kept closed while thecement is being clinkered. If closed, the products of combustion of thecoke become fixed into combustible gases and nitrogen precisely as inthe process hereinbefore described.

By means of the pipe P steam or oil may be commingled with the gasesmaking the down run. When steam is used thus, it is converted into fixedwater-gas. When oil is used, the gases are enriched for illuminatingpurposes.

Having thus described my invention, 1 claim- 1. The process of producinglime, cement or the like, and combustible gases, consisting in passingheated products of combustion of burning fuel through raw material, ascalciurn carbonate, raw cement or the like, thereby expelling gaseousmatter therefrom, and subsequently fixing products of combustion andgaseous matter from said material, by passing said products ofcombustion and said gaseous matter through a body of highlyheated fuel,substantially as described.

2. The process of producing cement and combustible gases consisting inpassing heated products of combustion of burning fuel through a mixtureof raw cement and carbonaceous fuel, thereby expelling from said mixtureall gaseous matter and vapors of water contained therein andsubsequently passing products of combustion of burning fuel and allgaseous matter and vapors of Water coming from said mixture of rawcement and carbonaceous fuel, through a body of highly-heated fuel,substantially as described.

3. The process of producing cement and combustible gases consisting inpassing heated products of combustion of burning fuel through a mixtureof raw cement and carbonaceous fuel, thereby expelling therefrom allgaseous matter and vapors of Water, clinkering the partially-burnedcement by burning the residual combustible matter mixed therewith, andsubsequently passing all products of combustion of burning fuel,together with all gaseous matter and vapors of water from said mixtureof raw cement and carbonaceous fuel, through a body of highlyheatedfuel, substantially as described.

4. The process of producing lime or cement and combustible gasesconsisting in passing heated products of combustion of burning fuelthrough raw material as raw cement or calcium carbonate, therebyexpelling therefrom all gaseous matter and vapors of Water, thereaftermixing with said products of co1nbustion, gaseous matter and vapors ofWater, steam or oil, or both steam and oil, and subsequently passing allthese products through a body of highly-heated fuel, substantially asdescribed.

5. The process of producing cement and combustible gases consisting inpassing heated products of combustion of burning fuel through a mixtureof raw cement and carbonaceous fuel, thereby expelling all gase ousmatter and vapors of water therefrom, clinkering the cement by burningresidual combustible matter contained therein, mixing with all gaseousmatter and products of combustion so obtained, steam or oil or bothsteam and oil and subsequently passing said mixture through a body ofhighly-heated fuel, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

ALVIN LINCOLN SOIIUBERT.

Witnesses:

W. F. TRATNOR, C. F. GORMAN.

